期刊
THIN SOLID FILMS
卷 568, 期 -, 页码 6-12出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2014.07.036
关键词
Graphene; Chemical vapour deposition; Volatile organic compounds; Quartz crystal microbalance; Gas sensors
类别
资金
- National Foundation for Science and Technology (NAFOSTED) [103.02-2010.37]
The detection of volatile organic compounds (VOCs) at room temperature with rapid response and recovery is important for early explosive alarm. Herein, we demonstrate significantly enhanced VOC-sensing properties of quartz crystal microbalance (QCM) coated with monolayer graphene film. The monolayer graphene was firstly synthesized by the chemical vapour deposition (CVD) method on Cu foil and then transferred to the gold electrode of the QCM for VOC-sensing application. The gas-sensing properties of the graphene-coated QCM sensor were examined at room temperature for various concentrations of numerous VOCs, including butanol, isopropanol, acetone, and ethanol. The results revealed that the graphene-coated QCM sensor exhibits the best performance with ethanol gas. The gas-sensing mechanism of the graphene-coated QCM sensor was attributed to the adsorption and desorption of VOC molecules on the defect sites of graphene sheet. (C) 2014 Elsevier B. V. All rights reserved.
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